/*

Feathers UI

Copyright 2026 Bowler Hat LLC. All Rights Reserved.

This program is free software. You can redistribute and/or modify it in

accordance with the terms of the accompanying license agreement.

*/

package feathers.utils;

import feathers.core.IFocusContainer;

import feathers.core.IFocusExtras;

import feathers.core.IFocusObject;

import openfl.display.DisplayObject;

import openfl.display.DisplayObjectContainer;

import openfl.errors.ArgumentError;

import openfl.geom.Point;

/**

Focus utility functions.

@see `feathers.core.FocusManager`

@since 1.0.0

**/

class FocusUtil {

public static function findAllFocusableObjects(target:DisplayObject, ?result:Array<IFocusObject>):Array<IFocusObject> {

if (result == null) {

result = [];

}

if ((target is IFocusObject)) {

var focusableObject:IFocusObject = cast target;

if (focusableObject.focusEnabled) {

result.push(focusableObject);

}

}

if ((target is IFocusExtras)) {

var focusExtras:IFocusExtras = cast target;

var extras = focusExtras.focusExtrasBefore;

if (extras != null) {

for (i in 0...extras.length) {

var childOfTarget = extras[i];

findAllFocusableObjects(childOfTarget, result);

}

}

}

if ((target is IFocusObject)) {

if ((target is IFocusContainer) && (cast target : IFocusContainer).childFocusEnabled) {

var otherContainer = cast(target, DisplayObjectContainer);

for (i in 0...otherContainer.numChildren) {

var childOfTarget = otherContainer.getChildAt(i);

findAllFocusableObjects(childOfTarget, result);

}

}

} else if ((target is DisplayObjectContainer)) {

var otherContainer:DisplayObjectContainer = cast target;

for (i in 0...otherContainer.numChildren) {

var childOfTarget = otherContainer.getChildAt(i);

findAllFocusableObjects(childOfTarget, result);

}

}

if ((target is IFocusExtras)) {

var focusExtras:IFocusExtras = cast target;

var extras = focusExtras.focusExtrasAfter;

if (extras != null) {

for (i in 0...extras.length) {

var childOfTarget = extras[i];

findAllFocusableObjects(childOfTarget, result);

}

}

}

return result;

}

}